Repacing part of string with a variable

divz · #1 (**permalink**) 07-19-2007

I have following strings in a file
DUPTASMTRMMBAL,20070416200704160117232101172321,,,,,,,@@@Y
DUPTASMTRMMCON,20070416200704160127189901271899,,,,,,,@@@Y
DUPTASMTRMMHG,,20070416200704160112051001120510,,,,,,,@@@Y

What i need to do is replace the date 20070416 with anoth date which is stored in variable enddate (enddate is result of certain calculations).

What i am tryning is this :-

for D in `cat file`;do
str1=`echo $D|cut -c1-15`
date1=`echo $D|cut -c16-23`
date2=`echo $D|cut -c24-31`
str2=`echo $D|cut -c32-`
enddate=$enddate
D=$str1$enddate$enddate$str2
done

This is not working.
Can someone please tell me an alternate method, using sed or awk. And also tell me why is this not working.

anbu23 · #2 (**permalink**) 07-19-2007

Code:

sed "s/20070416/$enddate/g" file > temp
mv temp file

Code:

for D in `cat file`;do
str1=`echo $D|cut -c1-15`
date1=`echo $D|cut -c16-23`
date2=`echo $D|cut -c24-31`
str2=`echo $D|cut -c32-`
enddate=$enddate
echo $str1$enddate$enddate$str2 >> temp
done
mv temp file

divz · #3 (**permalink**) 07-19-2007

[QUOTE=anbu23;302127633]

Code:

sed "s/20070416/$enddate/g" file > temp
mv temp file

This will not work for me, as i cannot give the string 20070416 and replace it with $enddate as this string is not fixed. It will keep changing everyday.

And sed "s/$date1/$enddate/g" file > temp does not work

divz · #4 (**permalink**) 07-19-2007

Code:

sed "s/20070416/$enddate/g" file > temp
mv temp file

Hey i tried again, the code sed "s/$date1/$enddate/g" works fine. I did some mistake earlier.
Thanks a lot for all your help!!!

divz · #5 (**permalink**) 07-19-2007

Code:

for D in `cat file`;do
str1=`echo $D|cut -c1-15`
date1=`echo $D|cut -c16-23`
date2=`echo $D|cut -c24-31`
str2=`echo $D|cut -c32-`
enddate=$enddate
echo $str1$enddate$enddate$str2 >> temp
done
mv temp file

[/QUOTE]

I have already tried this option. For some reason, I am getting repeated data. What i mean is, if there are three rows in file then there are 39 rows in temp. The three rows are repeated 13 times.
I am not able to understand why is this happening.

More UNIX and Linux Forum Topics You Might Find Helpful
Thread	Thread Starter	Forum	Replies	Last Post
Need help regarding replacing a part of string	veerapureddy	Shell Programming and Scripting	1	03-17-2008 09:02 AM
how to get the last part of a string followed by a pattern	bluemoon1	Shell Programming and Scripting	4	09-08-2007 12:10 PM
Extracting part of a string	sam_78_nyc	Shell Programming and Scripting	8	04-25-2007 08:37 PM
ksh: A part of variable A's name is inside of variable B, how to update A?	pa3be	Shell Programming and Scripting	4	03-30-2005 12:29 PM
using sed to replace a part of string	csejl	Shell Programming and Scripting	6	01-12-2004 11:48 AM

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search
Display Modes	Rate This Thread
Switch to Linear Mode Hybrid Mode Switch to Threaded Mode	Rate This Thread:


	Powered by